diff options
Diffstat (limited to 'src/plugins/platforms/cocoa/qnsview_drawing.mm')
| -rw-r--r-- | src/plugins/platforms/cocoa/qnsview_drawing.mm | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qnsview_drawing.mm b/src/plugins/platforms/cocoa/qnsview_drawing.mm new file mode 100644 index 0000000000..4f9d17504d --- /dev/null +++ b/src/plugins/platforms/cocoa/qnsview_drawing.mm @@ -0,0 +1,167 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// This file is included from qnsview.mm, and only used to organize the code + +@implementation QT_MANGLE_NAMESPACE(QNSView) (Drawing) + +- (BOOL)isOpaque +{ + if (!m_platformWindow) + return true; + return m_platformWindow->isOpaque(); +} + +- (BOOL)isFlipped +{ + return YES; +} + +- (void)drawRect:(NSRect)dirtyRect +{ + Q_UNUSED(dirtyRect); + + if (!m_platformWindow) + return; + + QRegion exposedRegion; + const NSRect *dirtyRects; + NSInteger numDirtyRects; + [self getRectsBeingDrawn:&dirtyRects count:&numDirtyRects]; + for (int i = 0; i < numDirtyRects; ++i) + exposedRegion += QRectF::fromCGRect(dirtyRects[i]).toRect(); + + qCDebug(lcQpaDrawing) << "[QNSView drawRect:]" << m_platformWindow->window() << exposedRegion; + m_platformWindow->handleExposeEvent(exposedRegion); +} + +- (BOOL)shouldUseMetalLayer +{ + // MetalSurface needs a layer, and so does VulkanSurface (via MoltenVK) + QSurface::SurfaceType surfaceType = m_platformWindow->window()->surfaceType(); + return surfaceType == QWindow::MetalSurface || surfaceType == QWindow::VulkanSurface; +} + +- (BOOL)wantsLayerHelper +{ + Q_ASSERT(m_platformWindow); + + bool wantsLayer = qt_mac_resolveOption(true, m_platformWindow->window(), + "_q_mac_wantsLayer", "QT_MAC_WANTS_LAYER"); + + bool layerForSurfaceType = [self shouldUseMetalLayer]; + + return wantsLayer || layerForSurfaceType; +} + +- (CALayer *)makeBackingLayer +{ + if ([self shouldUseMetalLayer]) { + // Check if Metal is supported. If it isn't then it's most likely + // too late at this point and the QWindow will be non-functional, + // but we can at least print a warning. + if (![MTLCreateSystemDefaultDevice() autorelease]) { + qWarning() << "QWindow initialization error: Metal is not supported"; + return [super makeBackingLayer]; + } + + CAMetalLayer *layer = [CAMetalLayer layer]; + + // Set the contentsScale for the layer. This is normally done in + // viewDidChangeBackingProperties, however on startup that function + // is called before the layer is created here. The layer's drawableSize + // is updated from layoutSublayersOfLayer as usual. + layer.contentsScale = self.window.backingScaleFactor; + + return layer; + } + + return [super makeBackingLayer]; +} + +- (NSViewLayerContentsRedrawPolicy)layerContentsRedrawPolicy +{ + // We need to set this explicitly since the super implementation + // returns LayerContentsRedrawNever for custom layers like CAMetalLayer. + return NSViewLayerContentsRedrawDuringViewResize; +} + +- (void)updateMetalLayerDrawableSize:(CAMetalLayer *)layer +{ + CGSize drawableSize = layer.bounds.size; + drawableSize.width *= layer.contentsScale; + drawableSize.height *= layer.contentsScale; + layer.drawableSize = drawableSize; +} + +- (void)layoutSublayersOfLayer:(CALayer *)layer +{ + if ([layer isKindOfClass:CAMetalLayer.class]) + [self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)]; +} + +- (void)displayLayer:(CALayer *)layer +{ + Q_ASSERT(layer == self.layer); + + if (!m_platformWindow) + return; + + qCDebug(lcQpaDrawing) << "[QNSView displayLayer]" << m_platformWindow->window(); + + // FIXME: Find out if there's a way to resolve the dirty rect like in drawRect: + m_platformWindow->handleExposeEvent(QRectF::fromCGRect(self.bounds).toRect()); +} + +- (void)viewDidChangeBackingProperties +{ + CALayer *layer = self.layer; + if (!layer) + return; + + layer.contentsScale = self.window.backingScaleFactor; + + // Metal layers must be manually updated on e.g. screen change + if ([layer isKindOfClass:CAMetalLayer.class]) { + [self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)]; + [self setNeedsDisplay:YES]; + } +} + +@end |